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2 years ago

How to do this?? help me please

Mathematics

1 answer:

alexira [117]2 years ago

3 0

Answer:

sinA = 0.79 tanA = 1.3

Step-by-step explanation:

Step1:

Find the length of the line going through the middle from A to C by using pythagorean theorem.

a = 13

b = 12

c= ?

c = sqrt(a^2 + b^2)

c = sqrt(13^2 +12^2)

c = 17.69

Step 2:

Use pythagorean theorem again to find the length of the line going from A to D.

a = ?

b = 14

c = 17.69

c^2 = a^2 + b^2

Now solve for a.

a^2 = c^2 - b^2

a = sqrt(c^2 - b^2)

a = sqrt(17.69^2 - 14^2)

a = 10.81

Step 3:

Use trignometry to find the values of sinA and tanA

sinA = opposite/hypotenuse = 14/17.69 = 0.79

tanA = opposite/adjacent = 14/10.81 =1.3

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Sergio [31]

Answer:

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Step-by-step explanation:

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3 years ago

A student needed to prepare 500mL of 1X TAE buffer to run a QC gel. The stock solution in the lab is 5X TAE. What volumes of sto

Xelga [282]

Answer:

you need 100ml of 5X TAE and 400ml of water.

Step-by-step explanation:

You need to use a rule of three:

$C_1V_1=C_2V_2$

where:

$\left \{ {{C_1= 5X} \atop {C_2=1X}} \right.$

and

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Therefore:

$V_{TAE} = \frac{V_2*C_2}{C_1}$

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3 years ago

Read 2 more answers

HOW MANY nibbles ARE IN ONE kilobyte?

Vilka [71]

Answer:

There are 2000 nibbles in 1 kilobyte

Step-by-step explanation:

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3 years ago

The volume of a cube is 216 cubic inches. What is the length of each side of the cube?

Zielflug [23.3K]

Answer:

6 inch

Step-by-step explanation:

If you remember the concept of how to find volume of cube then its pretty easy.

You find it by multiplying the length of one side by itself 3 times.

In this case we have to do opposite so we have to just find the cube root of 216 which is 6.

Pls make me brainliest if you find it helpful.

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4 years ago

One coin in a collection of 65 has two heads. The rest are fair. If a coin, chosen at random from the lot and then tossed, turns

geniusboy [140]

Answer:

P=1/65.

Step-by-step explanation:

We knaow that one coin in a collection of 65 has two heads. If a coin, chosen at random from the lot and then tossed, turns up heads 6 times in a row. We calculate the probability that it is the two-headed coin.

We calculate the number of possible combinations:

$C_1^{65}=\frac{65!}{1!(65-1)!}=65$

Number of favorable combinations is 1.

Therefore, the probability is

P=1/65.

6 0

3 years ago

How to do this?? help me please ​

How to do this?? help me please